Zte Z791 User Manual page 151

Problem
PIN Code
blocked
Unable to
enter
information
into the
phonebook
Phone
crashes,
reboots,
Possible causes
You have activated the
Fixed dial numbers
feature.
You have entered an
incorrect PIN code three
consecutive times.
The phonebook's
memory is already full.
Some third-party
software is not
compatible with your
Possible solution
Go to
Key > Settings > Fixed
Dialing Numbers and
disable it.
Contact your service
provider. If the service
provider provides the
SIM card's PUK code,
use the PUK code to
unlock the SIM card.
Delete unnecessary
data from the contacts.
Reset the phone to
factory status.
151
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